content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ------------------
   * DatasetReader.java
   * ------------------
   * (C) Copyright 2002-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 20-Nov-2002 : Version 1 (DG);
   *
   */
  
  package org.jfree.data.xml;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  import javax.xml.parsers.ParserConfigurationException;
  import javax.xml.parsers.SAXParser;
  import javax.xml.parsers.SAXParserFactory;
  
  import org.jfree.data.category.CategoryDataset;
  import org.jfree.data.general.PieDataset;
  import org.xml.sax.SAXException;
  
  /**
   * A utility class for reading datasets from XML.
   */
  public class DatasetReader {
  
      /**
       * Reads a {@link PieDataset} from an XML file.
       *
       * @param file  the file.
       *
       * @return A dataset.
       *
       * @throws IOException if there is a problem reading the file.
       */
      public static PieDataset readPieDatasetFromXML(File file)
          throws IOException {
          InputStream in = new FileInputStream(file);
          return readPieDatasetFromXML(in);
      }
  
      /**
       * Reads a {@link PieDataset} from a stream.
       *
       * @param in  the input stream.
       *
       * @return A dataset.
       *
       * @throws IOException if there is an I/O error.
       */
      public static PieDataset readPieDatasetFromXML(InputStream in)
          throws IOException {
  
          PieDataset result = null;
          SAXParserFactory factory = SAXParserFactory.newInstance();
          try {
              SAXParser parser = factory.newSAXParser();
              PieDatasetHandler handler = new PieDatasetHandler();
              parser.parse(in, handler);
              result = handler.getDataset();
          }
          catch (SAXException e) {
              System.out.println(e.getMessage());
          }
          catch (ParserConfigurationException e2) {
              System.out.println(e2.getMessage());
          }
          return result;
  
      }
  
      /**
       * Reads a {@link CategoryDataset} from a file.
       *
       * @param file  the file.
       *
       * @return A dataset.
       *
       * @throws IOException if there is a problem reading the file.
       */
      public static CategoryDataset readCategoryDatasetFromXML(File file)
          throws IOException {
          InputStream in = new FileInputStream(file);
          return readCategoryDatasetFromXML(in);
      }
  
      /**
       * Reads a {@link CategoryDataset} from a stream.
       *
       * @param in  the stream.
       *
       * @return A dataset.
       *
       * @throws IOException if there is a problem reading the file.
       */
      public static CategoryDataset readCategoryDatasetFromXML(InputStream in)
          throws IOException {
  
          CategoryDataset result = null;
  
          SAXParserFactory factory = SAXParserFactory.newInstance();
          try {
              SAXParser parser = factory.newSAXParser();
              CategoryDatasetHandler handler = new CategoryDatasetHandler();
              parser.parse(in, handler);
              result = handler.getDataset();
          }
          catch (SAXException e) {
              System.out.println(e.getMessage());
          }
          catch (ParserConfigurationException e2) {
              System.out.println(e2.getMessage());
          }
          return result;
  
      }
  
  }
  